Any way to have video sent from decks 3/4 instead of 1/2?

Hi Nick,

Is there any way to force ME to take the video from decks 3/4 in serato instead of 1/2? I'm trying to find a way of doing 2 laptops/4 deck video with a DJM 900NXS2 which makes laptop one take 1/2 and laptop two take 3/4

My plan would then be to then vision mix the two laptops outputs. Are there any more elegant 4 deck visual solutions around?

Thanks